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GLSA-200510-15 : Lynx: Buffer overflow in NNTP processing

2005-10-19T00:00:00
ID GENTOO_GLSA-200510-15.NASL
Type nessus
Reporter This script is Copyright (C) 2005-2019 Tenable Network Security, Inc.
Modified 2019-12-02T00:00:00

Description

The remote host is affected by the vulnerability described in GLSA-200510-15 (Lynx: Buffer overflow in NNTP processing)

When accessing a NNTP URL, Lynx connects to a NNTP server and
retrieves information about the available articles in the target
newsgroup. Ulf Harnhammar discovered a buffer overflow in a function
that handles the escaping of special characters.

Impact :

An attacker could setup a malicious NNTP server and entice a user
to access it using Lynx (either by creating NNTP links on a web page or
by forcing a redirect for Lynx users). The data returned by the NNTP
server would trigger the buffer overflow and execute arbitrary code
with the rights of the user running Lynx.

Workaround :

There is no known workaround at this time.


                                        
                                            #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200510-15.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(20035);
  script_version("1.16");
  script_cvs_date("Date: 2019/08/02 13:32:42");

  script_cve_id("CVE-2005-3120");
  script_xref(name:"GLSA", value:"200510-15");

  script_name(english:"GLSA-200510-15 : Lynx: Buffer overflow in NNTP processing");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200510-15
(Lynx: Buffer overflow in NNTP processing)

    When accessing a NNTP URL, Lynx connects to a NNTP server and
    retrieves information about the available articles in the target
    newsgroup. Ulf Harnhammar discovered a buffer overflow in a function
    that handles the escaping of special characters.
  
Impact :

    An attacker could setup a malicious NNTP server and entice a user
    to access it using Lynx (either by creating NNTP links on a web page or
    by forcing a redirect for Lynx users). The data returned by the NNTP
    server would trigger the buffer overflow and execute arbitrary code
    with the rights of the user running Lynx.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200510-15"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Lynx users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=www-client/lynx-2.8.5-r1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:lynx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/10/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/10/19");
  script_set_attribute(attribute:"vuln_publication_date", value:"2005/08/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"www-client/lynx", unaffected:make_list("ge 2.8.5-r1"), vulnerable:make_list("lt 2.8.5-r1"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Lynx");
}
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